Journal
NANO LETTERS
Volume 10, Issue 7, Pages 2667-2673Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl101457k
Keywords
Strain; phase transition; correlated electron nanomaterials; vanacium dioxide; mechanical strength
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Funding
- Lawrence Berkeley National Laboratory (LBNL) under U S Department of Energy [DE-AC02-05CH11231]
- National Science Foundation (NSF) [EEC-0832819, DMR-0507146]
- Office of Science, Office of Basic Energy Sciences, of the U S Department of Energy [DE-AC02-05CH11231]
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Single-crystal micro- and nanomaterials often exhibit higher yield strength than their bulk counterparts This enhancement is widely recognized in structural materials but is rarely exploited to probe fundamental physics of electronic materials Vanadium dioxide exhibits coupled electronic and structural phase transitions that involve different structures existing at different strain states Full understanding of the driving mechanism of these coupled transitions necessitates concurrent structural and electrical measurements over a wide phase space Taking advantages of the superior mechanical property of micro/nanocrystals of VO2, we map and explore its stress-temperature phase diagram over a phase space that is more than an order of magnitude broader than previously attained New structural and electronic aspects were observed crossing phase boundaries at high-strain states Our work shows that the actively tuning strain in micro/nanoscale electronic materials provides an effective route to investigate their fundamental properties beyond what can be accessed in their bulk counterpart
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